Dyeing.



UNITED STATES PATENT OFFICE.

HEXTALL HARVEY KELSEY, OF LONDON, ENGLAND, ASSIGNOR T0 NORMAN MALCOLMSON. OF LONDON. ENGLAND.

Patented Jan. 29, 1918.

DYEING.

1,254L81() Specification of Letters Patent.

No Drawing. Application filed June 4, 1917.

To all whom it may concern:

Be it known that I, HEXTALL HARVEY KEL- sm', a subject of the King of England, residing at London. England, have invented certain new and useful Improvements in Dyeing, of which the following is a specification.

The present invention relates to the em ployment of sea-weed as a dyestufl. Pigments of various colors are contained in seaweed of the melanosperm, rhodosperm and chlorosperm groups. Certain colors are remarkably constant in large natural algae groups. Thus the Fucacece exhibit a brown or olive color, and the Florz'deaz a beautiful rose-red.

The present invention comprises, subject to the exceptions hereinafter set forth and disclaimed, a process of dyeing by means of a dye-stuff or a dye produced from the melanosperm, rhodiosperm and chlorosperm groups of sea-Weed.

It is prior knowledge that dulse or duil- Sig (Rhoolymemla adults) has been heretofore used to produce a somewhat fugitive reddish dye and it is to be understood that the use of dulse for the production of reddish dye is not of the present invention and is one of the exceptions above referred to.

The inventor has discovered that colors may be imparted to fabrics by merely boiling' theparticular sea-iveed proposed to be used, with the fabric to be dyed; for example from one ounce upward of the weed to a pound of the fabric to be dyed.

The present invention comprises a process of dyeing which consists in putting the material that is to be .dyed into a bath of water or spirit containing either in the raw state or in paste or powder form, a sea-weed of the rhodosperm group (except dulse) or the chlorosperm group.

It also comprises a process of ,dyeingwhich consists inputting the material that is to be dyed into a bath of water or spirit containing either in the raw state or in aste or powder" form, a sea-weed of the me anosperm group, except Lnmiimria in the case when laminaria powder-is containe ina paste with indigo according to the specifi cation of expired prior British Letters Patout No. 1789/1902 granted to J. Y. Johnson.

Serial No. 1 72,845.

The paste or powder above referred to can be obtained by subjecting the sea-weed to a the melanosperm or chlorosperm or rhodo-.

sperm powder or paste or a dyeing liquid derived from any of these groups of seaweed the addition to the dye beek of a sul uric-acid solution intensifies and deepens the color produced on the fabric. As an example .of an ounce of powder and of an ounce of concentrated sulfuric acid mixed with 2; pint of water will make a good dyeing-liquid.

The colors imparted to the fabric from the sea-weed dyes aforesaid are fast colors and do not necessarily in ilvethe use of mordants.

All the known dye-stuffs, mordants, liq- .uors, or topping baths may be used, either separately or mixed with the sea-weed, powder or paste or their solutions for the purpose of varying, intensifying or fixing any of the colors if desired.

Different types of weed or the colors obtained therefrom can be mii'ied, to obtain varying shades and tints.

I am aware that dnlse orduilsig (Rhodycdiflr's) has been used as a dye and I make no claim to the employment of dulse as a dye-stuff. nor do I claim anything described or claimed in the specification of expired British Letters Patent No. 142/81 (Standford) or No. 1789/02 (Johnson).

W'hat I claim as my invention and desire to secure by Letters Patent is 1. A process of dyeing by putting the material that is to be dyed into a bathof germ group.

2. A. rocess of dyeing by putting the material t at is to be dyed into a bath of pIid containing a sea-weed of the melanowater containing a sea-weed of the menalosperm group.

3. A process of dyeing by putting the materiid that is to be dyed 11mm bath of water 5 containing a sea-weed of the lnelunosperm group in powder.

4. The addition to a dyeing liquid d0.-

furic acid for the purpose of intensifying 01' \"m'ying the 00101 imparted by the liquid L rived from nwlanospcrm sen-weed u'l' sult6 the nmicrinl dyed.

1n iestnnony whereof I. allix my signaure.

l-IEXTALL HARVEY KELSEY. 

